ixgb_ethtool.c

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/*******************************************************************************

  Intel PRO/10GbE Linux driver
  Copyright(c) 1999 - 2008 Intel Corporation.

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Contact Information:
  Linux NICS <[email protected]>
  e1000-devel Mailing List <[email protected]>
  Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497

*******************************************************************************/

/* ethtool support for ixgb */

#include "ixgb.h"

#include <asm/uaccess.h>

#define IXGB_ALL_RAR_ENTRIES 16

enum {NETDEV_STATS, IXGB_STATS};

struct ixgb_stats {
    char stat_string[ETH_GSTRING_LEN];
    int type;
    int sizeof_stat;
    int stat_offset;
};

#define IXGB_STAT(m)        IXGB_STATS, \
                FIELD_SIZEOF(struct ixgb_adapter, m), \
                offsetof(struct ixgb_adapter, m)
#define IXGB_NETDEV_STAT(m) NETDEV_STATS, \
                FIELD_SIZEOF(struct net_device, m), \
                offsetof(struct net_device, m)

static struct ixgb_stats ixgb_gstrings_stats[] = {
    {"rx_packets", IXGB_NETDEV_STAT(stats.rx_packets)},
    {"tx_packets", IXGB_NETDEV_STAT(stats.tx_packets)},
    {"rx_bytes", IXGB_NETDEV_STAT(stats.rx_bytes)},
    {"tx_bytes", IXGB_NETDEV_STAT(stats.tx_bytes)},
    {"rx_errors", IXGB_NETDEV_STAT(stats.rx_errors)},
    {"tx_errors", IXGB_NETDEV_STAT(stats.tx_errors)},
    {"rx_dropped", IXGB_NETDEV_STAT(stats.rx_dropped)},
    {"tx_dropped", IXGB_NETDEV_STAT(stats.tx_dropped)},
    {"multicast", IXGB_NETDEV_STAT(stats.multicast)},
    {"collisions", IXGB_NETDEV_STAT(stats.collisions)},

/*  { "rx_length_errors", IXGB_NETDEV_STAT(stats.rx_length_errors) },   */
    {"rx_over_errors", IXGB_NETDEV_STAT(stats.rx_over_errors)},
    {"rx_crc_errors", IXGB_NETDEV_STAT(stats.rx_crc_errors)},
    {"rx_frame_errors", IXGB_NETDEV_STAT(stats.rx_frame_errors)},
    {"rx_no_buffer_count", IXGB_STAT(stats.rnbc)},
    {"rx_fifo_errors", IXGB_NETDEV_STAT(stats.rx_fifo_errors)},
    {"rx_missed_errors", IXGB_NETDEV_STAT(stats.rx_missed_errors)},
    {"tx_aborted_errors", IXGB_NETDEV_STAT(stats.tx_aborted_errors)},
    {"tx_carrier_errors", IXGB_NETDEV_STAT(stats.tx_carrier_errors)},
    {"tx_fifo_errors", IXGB_NETDEV_STAT(stats.tx_fifo_errors)},
    {"tx_heartbeat_errors", IXGB_NETDEV_STAT(stats.tx_heartbeat_errors)},
    {"tx_window_errors", IXGB_NETDEV_STAT(stats.tx_window_errors)},
    {"tx_deferred_ok", IXGB_STAT(stats.dc)},
    {"tx_timeout_count", IXGB_STAT(tx_timeout_count) },
    {"tx_restart_queue", IXGB_STAT(restart_queue) },
    {"rx_long_length_errors", IXGB_STAT(stats.roc)},
    {"rx_short_length_errors", IXGB_STAT(stats.ruc)},
    {"tx_tcp_seg_good", IXGB_STAT(stats.tsctc)},
    {"tx_tcp_seg_failed", IXGB_STAT(stats.tsctfc)},
    {"rx_flow_control_xon", IXGB_STAT(stats.xonrxc)},
    {"rx_flow_control_xoff", IXGB_STAT(stats.xoffrxc)},
    {"tx_flow_control_xon", IXGB_STAT(stats.xontxc)},
    {"tx_flow_control_xoff", IXGB_STAT(stats.xofftxc)},
    {"rx_csum_offload_good", IXGB_STAT(hw_csum_rx_good)},
    {"rx_csum_offload_errors", IXGB_STAT(hw_csum_rx_error)},
    {"tx_csum_offload_good", IXGB_STAT(hw_csum_tx_good)},
    {"tx_csum_offload_errors", IXGB_STAT(hw_csum_tx_error)}
};

#define IXGB_STATS_LEN  ARRAY_SIZE(ixgb_gstrings_stats)

static int
ixgb_get_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);

    ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
    ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
    ecmd->port = PORT_FIBRE;
    ecmd->transceiver = XCVR_EXTERNAL;

    if (netif_carrier_ok(adapter->netdev)) {
        ethtool_cmd_speed_set(ecmd, SPEED_10000);
        ecmd->duplex = DUPLEX_FULL;
    } else {
        ethtool_cmd_speed_set(ecmd, -1);
        ecmd->duplex = -1;
    }

    ecmd->autoneg = AUTONEG_DISABLE;
    return 0;
}

void ixgb_set_speed_duplex(struct net_device *netdev)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    /* be optimistic about our link, since we were up before */
    adapter->link_speed = 10000;
    adapter->link_duplex = FULL_DUPLEX;
    netif_carrier_on(netdev);
    netif_wake_queue(netdev);
}

static int
ixgb_set_settings(struct net_device *netdev, struct ethtool_cmd *ecmd)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    u32 speed = ethtool_cmd_speed(ecmd);

    if (ecmd->autoneg == AUTONEG_ENABLE ||
        (speed + ecmd->duplex != SPEED_10000 + DUPLEX_FULL))
        return -EINVAL;

    if (netif_running(adapter->netdev)) {
        ixgb_down(adapter, true);
        ixgb_reset(adapter);
        ixgb_up(adapter);
        ixgb_set_speed_duplex(netdev);
    } else
        ixgb_reset(adapter);

    return 0;
}

static void
ixgb_get_pauseparam(struct net_device *netdev,
             struct ethtool_pauseparam *pause)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_hw *hw = &adapter->hw;

    pause->autoneg = AUTONEG_DISABLE;

    if (hw->fc.type == ixgb_fc_rx_pause)
        pause->rx_pause = 1;
    else if (hw->fc.type == ixgb_fc_tx_pause)
        pause->tx_pause = 1;
    else if (hw->fc.type == ixgb_fc_full) {
        pause->rx_pause = 1;
        pause->tx_pause = 1;
    }
}

static int
ixgb_set_pauseparam(struct net_device *netdev,
             struct ethtool_pauseparam *pause)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_hw *hw = &adapter->hw;

    if (pause->autoneg == AUTONEG_ENABLE)
        return -EINVAL;

    if (pause->rx_pause && pause->tx_pause)
        hw->fc.type = ixgb_fc_full;
    else if (pause->rx_pause && !pause->tx_pause)
        hw->fc.type = ixgb_fc_rx_pause;
    else if (!pause->rx_pause && pause->tx_pause)
        hw->fc.type = ixgb_fc_tx_pause;
    else if (!pause->rx_pause && !pause->tx_pause)
        hw->fc.type = ixgb_fc_none;

    if (netif_running(adapter->netdev)) {
        ixgb_down(adapter, true);
        ixgb_up(adapter);
        ixgb_set_speed_duplex(netdev);
    } else
        ixgb_reset(adapter);

    return 0;
}

static u32
ixgb_get_msglevel(struct net_device *netdev)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    return adapter->msg_enable;
}

static void
ixgb_set_msglevel(struct net_device *netdev, u32 data)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    adapter->msg_enable = data;
}
#define IXGB_GET_STAT(_A_, _R_) _A_->stats._R_

static int
ixgb_get_regs_len(struct net_device *netdev)
{
#define IXGB_REG_DUMP_LEN  136*sizeof(u32)
    return IXGB_REG_DUMP_LEN;
}

static void
ixgb_get_regs(struct net_device *netdev,
           struct ethtool_regs *regs, void *p)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_hw *hw = &adapter->hw;
    u32 *reg = p;
    u32 *reg_start = reg;
    u8 i;

    /* the 1 (one) below indicates an attempt at versioning, if the
     * interface in ethtool or the driver changes, this 1 should be
     * incremented */
    regs->version = (1<<24) | hw->revision_id << 16 | hw->device_id;

    /* General Registers */
    *reg++ = IXGB_READ_REG(hw, CTRL0);  /*   0 */
    *reg++ = IXGB_READ_REG(hw, CTRL1);  /*   1 */
    *reg++ = IXGB_READ_REG(hw, STATUS); /*   2 */
    *reg++ = IXGB_READ_REG(hw, EECD);   /*   3 */
    *reg++ = IXGB_READ_REG(hw, MFS);    /*   4 */

    /* Interrupt */
    *reg++ = IXGB_READ_REG(hw, ICR);    /*   5 */
    *reg++ = IXGB_READ_REG(hw, ICS);    /*   6 */
    *reg++ = IXGB_READ_REG(hw, IMS);    /*   7 */
    *reg++ = IXGB_READ_REG(hw, IMC);    /*   8 */

    /* Receive */
    *reg++ = IXGB_READ_REG(hw, RCTL);   /*   9 */
    *reg++ = IXGB_READ_REG(hw, FCRTL);  /*  10 */
    *reg++ = IXGB_READ_REG(hw, FCRTH);  /*  11 */
    *reg++ = IXGB_READ_REG(hw, RDBAL);  /*  12 */
    *reg++ = IXGB_READ_REG(hw, RDBAH);  /*  13 */
    *reg++ = IXGB_READ_REG(hw, RDLEN);  /*  14 */
    *reg++ = IXGB_READ_REG(hw, RDH);    /*  15 */
    *reg++ = IXGB_READ_REG(hw, RDT);    /*  16 */
    *reg++ = IXGB_READ_REG(hw, RDTR);   /*  17 */
    *reg++ = IXGB_READ_REG(hw, RXDCTL); /*  18 */
    *reg++ = IXGB_READ_REG(hw, RAIDC);  /*  19 */
    *reg++ = IXGB_READ_REG(hw, RXCSUM); /*  20 */

    /* there are 16 RAR entries in hardware, we only use 3 */
    for (i = 0; i < IXGB_ALL_RAR_ENTRIES; i++) {
        *reg++ = IXGB_READ_REG_ARRAY(hw, RAL, (i << 1)); /*21,...,51 */
        *reg++ = IXGB_READ_REG_ARRAY(hw, RAH, (i << 1)); /*22,...,52 */
    }

    /* Transmit */
    *reg++ = IXGB_READ_REG(hw, TCTL);   /*  53 */
    *reg++ = IXGB_READ_REG(hw, TDBAL);  /*  54 */
    *reg++ = IXGB_READ_REG(hw, TDBAH);  /*  55 */
    *reg++ = IXGB_READ_REG(hw, TDLEN);  /*  56 */
    *reg++ = IXGB_READ_REG(hw, TDH);    /*  57 */
    *reg++ = IXGB_READ_REG(hw, TDT);    /*  58 */
    *reg++ = IXGB_READ_REG(hw, TIDV);   /*  59 */
    *reg++ = IXGB_READ_REG(hw, TXDCTL); /*  60 */
    *reg++ = IXGB_READ_REG(hw, TSPMT);  /*  61 */
    *reg++ = IXGB_READ_REG(hw, PAP);    /*  62 */

    /* Physical */
    *reg++ = IXGB_READ_REG(hw, PCSC1);  /*  63 */
    *reg++ = IXGB_READ_REG(hw, PCSC2);  /*  64 */
    *reg++ = IXGB_READ_REG(hw, PCSS1);  /*  65 */
    *reg++ = IXGB_READ_REG(hw, PCSS2);  /*  66 */
    *reg++ = IXGB_READ_REG(hw, XPCSS);  /*  67 */
    *reg++ = IXGB_READ_REG(hw, UCCR);   /*  68 */
    *reg++ = IXGB_READ_REG(hw, XPCSTC); /*  69 */
    *reg++ = IXGB_READ_REG(hw, MACA);   /*  70 */
    *reg++ = IXGB_READ_REG(hw, APAE);   /*  71 */
    *reg++ = IXGB_READ_REG(hw, ARD);    /*  72 */
    *reg++ = IXGB_READ_REG(hw, AIS);    /*  73 */
    *reg++ = IXGB_READ_REG(hw, MSCA);   /*  74 */
    *reg++ = IXGB_READ_REG(hw, MSRWD);  /*  75 */

    /* Statistics */
    *reg++ = IXGB_GET_STAT(adapter, tprl);  /*  76 */
    *reg++ = IXGB_GET_STAT(adapter, tprh);  /*  77 */
    *reg++ = IXGB_GET_STAT(adapter, gprcl); /*  78 */
    *reg++ = IXGB_GET_STAT(adapter, gprch); /*  79 */
    *reg++ = IXGB_GET_STAT(adapter, bprcl); /*  80 */
    *reg++ = IXGB_GET_STAT(adapter, bprch); /*  81 */
    *reg++ = IXGB_GET_STAT(adapter, mprcl); /*  82 */
    *reg++ = IXGB_GET_STAT(adapter, mprch); /*  83 */
    *reg++ = IXGB_GET_STAT(adapter, uprcl); /*  84 */
    *reg++ = IXGB_GET_STAT(adapter, uprch); /*  85 */
    *reg++ = IXGB_GET_STAT(adapter, vprcl); /*  86 */
    *reg++ = IXGB_GET_STAT(adapter, vprch); /*  87 */
    *reg++ = IXGB_GET_STAT(adapter, jprcl); /*  88 */
    *reg++ = IXGB_GET_STAT(adapter, jprch); /*  89 */
    *reg++ = IXGB_GET_STAT(adapter, gorcl); /*  90 */
    *reg++ = IXGB_GET_STAT(adapter, gorch); /*  91 */
    *reg++ = IXGB_GET_STAT(adapter, torl);  /*  92 */
    *reg++ = IXGB_GET_STAT(adapter, torh);  /*  93 */
    *reg++ = IXGB_GET_STAT(adapter, rnbc);  /*  94 */
    *reg++ = IXGB_GET_STAT(adapter, ruc);   /*  95 */
    *reg++ = IXGB_GET_STAT(adapter, roc);   /*  96 */
    *reg++ = IXGB_GET_STAT(adapter, rlec);  /*  97 */
    *reg++ = IXGB_GET_STAT(adapter, crcerrs);   /*  98 */
    *reg++ = IXGB_GET_STAT(adapter, icbc);  /*  99 */
    *reg++ = IXGB_GET_STAT(adapter, ecbc);  /* 100 */
    *reg++ = IXGB_GET_STAT(adapter, mpc);   /* 101 */
    *reg++ = IXGB_GET_STAT(adapter, tptl);  /* 102 */
    *reg++ = IXGB_GET_STAT(adapter, tpth);  /* 103 */
    *reg++ = IXGB_GET_STAT(adapter, gptcl); /* 104 */
    *reg++ = IXGB_GET_STAT(adapter, gptch); /* 105 */
    *reg++ = IXGB_GET_STAT(adapter, bptcl); /* 106 */
    *reg++ = IXGB_GET_STAT(adapter, bptch); /* 107 */
    *reg++ = IXGB_GET_STAT(adapter, mptcl); /* 108 */
    *reg++ = IXGB_GET_STAT(adapter, mptch); /* 109 */
    *reg++ = IXGB_GET_STAT(adapter, uptcl); /* 110 */
    *reg++ = IXGB_GET_STAT(adapter, uptch); /* 111 */
    *reg++ = IXGB_GET_STAT(adapter, vptcl); /* 112 */
    *reg++ = IXGB_GET_STAT(adapter, vptch); /* 113 */
    *reg++ = IXGB_GET_STAT(adapter, jptcl); /* 114 */
    *reg++ = IXGB_GET_STAT(adapter, jptch); /* 115 */
    *reg++ = IXGB_GET_STAT(adapter, gotcl); /* 116 */
    *reg++ = IXGB_GET_STAT(adapter, gotch); /* 117 */
    *reg++ = IXGB_GET_STAT(adapter, totl);  /* 118 */
    *reg++ = IXGB_GET_STAT(adapter, toth);  /* 119 */
    *reg++ = IXGB_GET_STAT(adapter, dc);    /* 120 */
    *reg++ = IXGB_GET_STAT(adapter, plt64c);    /* 121 */
    *reg++ = IXGB_GET_STAT(adapter, tsctc); /* 122 */
    *reg++ = IXGB_GET_STAT(adapter, tsctfc);    /* 123 */
    *reg++ = IXGB_GET_STAT(adapter, ibic);  /* 124 */
    *reg++ = IXGB_GET_STAT(adapter, rfc);   /* 125 */
    *reg++ = IXGB_GET_STAT(adapter, lfc);   /* 126 */
    *reg++ = IXGB_GET_STAT(adapter, pfrc);  /* 127 */
    *reg++ = IXGB_GET_STAT(adapter, pftc);  /* 128 */
    *reg++ = IXGB_GET_STAT(adapter, mcfrc); /* 129 */
    *reg++ = IXGB_GET_STAT(adapter, mcftc); /* 130 */
    *reg++ = IXGB_GET_STAT(adapter, xonrxc);    /* 131 */
    *reg++ = IXGB_GET_STAT(adapter, xontxc);    /* 132 */
    *reg++ = IXGB_GET_STAT(adapter, xoffrxc);   /* 133 */
    *reg++ = IXGB_GET_STAT(adapter, xofftxc);   /* 134 */
    *reg++ = IXGB_GET_STAT(adapter, rjc);   /* 135 */

    regs->len = (reg - reg_start) * sizeof(u32);
}

static int
ixgb_get_eeprom_len(struct net_device *netdev)
{
    /* return size in bytes */
    return IXGB_EEPROM_SIZE << 1;
}

static int
ixgb_get_eeprom(struct net_device *netdev,
          struct ethtool_eeprom *eeprom, u8 *bytes)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_hw *hw = &adapter->hw;
    __le16 *eeprom_buff;
    int i, max_len, first_word, last_word;
    int ret_val = 0;

    if (eeprom->len == 0) {
        ret_val = -EINVAL;
        goto geeprom_error;
    }

    eeprom->magic = hw->vendor_id | (hw->device_id << 16);

    max_len = ixgb_get_eeprom_len(netdev);

    if (eeprom->offset > eeprom->offset + eeprom->len) {
        ret_val = -EINVAL;
        goto geeprom_error;
    }

    if ((eeprom->offset + eeprom->len) > max_len)
        eeprom->len = (max_len - eeprom->offset);

    first_word = eeprom->offset >> 1;
    last_word = (eeprom->offset + eeprom->len - 1) >> 1;

    eeprom_buff = kmalloc(sizeof(__le16) *
            (last_word - first_word + 1), GFP_KERNEL);
    if (!eeprom_buff)
        return -ENOMEM;

    /* note the eeprom was good because the driver loaded */
    for (i = 0; i <= (last_word - first_word); i++)
        eeprom_buff[i] = ixgb_get_eeprom_word(hw, (first_word + i));

    memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 1), eeprom->len);
    kfree(eeprom_buff);

geeprom_error:
    return ret_val;
}

static int
ixgb_set_eeprom(struct net_device *netdev,
          struct ethtool_eeprom *eeprom, u8 *bytes)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_hw *hw = &adapter->hw;
    u16 *eeprom_buff;
    void *ptr;
    int max_len, first_word, last_word;
    u16 i;

    if (eeprom->len == 0)
        return -EINVAL;

    if (eeprom->magic != (hw->vendor_id | (hw->device_id << 16)))
        return -EFAULT;

    max_len = ixgb_get_eeprom_len(netdev);

    if (eeprom->offset > eeprom->offset + eeprom->len)
        return -EINVAL;

    if ((eeprom->offset + eeprom->len) > max_len)
        eeprom->len = (max_len - eeprom->offset);

    first_word = eeprom->offset >> 1;
    last_word = (eeprom->offset + eeprom->len - 1) >> 1;
    eeprom_buff = kmalloc(max_len, GFP_KERNEL);
    if (!eeprom_buff)
        return -ENOMEM;

    ptr = (void *)eeprom_buff;

    if (eeprom->offset & 1) {
        /* need read/modify/write of first changed EEPROM word */
        /* only the second byte of the word is being modified */
        eeprom_buff[0] = ixgb_read_eeprom(hw, first_word);
        ptr++;
    }
    if ((eeprom->offset + eeprom->len) & 1) {
        /* need read/modify/write of last changed EEPROM word */
        /* only the first byte of the word is being modified */
        eeprom_buff[last_word - first_word]
            = ixgb_read_eeprom(hw, last_word);
    }

    memcpy(ptr, bytes, eeprom->len);
    for (i = 0; i <= (last_word - first_word); i++)
        ixgb_write_eeprom(hw, first_word + i, eeprom_buff[i]);

    /* Update the checksum over the first part of the EEPROM if needed */
    if (first_word <= EEPROM_CHECKSUM_REG)
        ixgb_update_eeprom_checksum(hw);

    kfree(eeprom_buff);
    return 0;
}

static void
ixgb_get_drvinfo(struct net_device *netdev,
           struct ethtool_drvinfo *drvinfo)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);

    strlcpy(drvinfo->driver,  ixgb_driver_name,
        sizeof(drvinfo->driver));
    strlcpy(drvinfo->version, ixgb_driver_version,
        sizeof(drvinfo->version));
    strlcpy(drvinfo->bus_info, pci_name(adapter->pdev),
        sizeof(drvinfo->bus_info));
    drvinfo->n_stats = IXGB_STATS_LEN;
    drvinfo->regdump_len = ixgb_get_regs_len(netdev);
    drvinfo->eedump_len = ixgb_get_eeprom_len(netdev);
}

static void
ixgb_get_ringparam(struct net_device *netdev,
        struct ethtool_ringparam *ring)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_desc_ring *txdr = &adapter->tx_ring;
    struct ixgb_desc_ring *rxdr = &adapter->rx_ring;

    ring->rx_max_pending = MAX_RXD;
    ring->tx_max_pending = MAX_TXD;
    ring->rx_pending = rxdr->count;
    ring->tx_pending = txdr->count;
}

static int
ixgb_set_ringparam(struct net_device *netdev,
        struct ethtool_ringparam *ring)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    struct ixgb_desc_ring *txdr = &adapter->tx_ring;
    struct ixgb_desc_ring *rxdr = &adapter->rx_ring;
    struct ixgb_desc_ring tx_old, tx_new, rx_old, rx_new;
    int err;

    tx_old = adapter->tx_ring;
    rx_old = adapter->rx_ring;

    if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
        return -EINVAL;

    if (netif_running(adapter->netdev))
        ixgb_down(adapter, true);

    rxdr->count = max(ring->rx_pending,(u32)MIN_RXD);
    rxdr->count = min(rxdr->count,(u32)MAX_RXD);
    rxdr->count = ALIGN(rxdr->count, IXGB_REQ_RX_DESCRIPTOR_MULTIPLE);

    txdr->count = max(ring->tx_pending,(u32)MIN_TXD);
    txdr->count = min(txdr->count,(u32)MAX_TXD);
    txdr->count = ALIGN(txdr->count, IXGB_REQ_TX_DESCRIPTOR_MULTIPLE);

    if (netif_running(adapter->netdev)) {
        /* Try to get new resources before deleting old */
        if ((err = ixgb_setup_rx_resources(adapter)))
            goto err_setup_rx;
        if ((err = ixgb_setup_tx_resources(adapter)))
            goto err_setup_tx;

        /* save the new, restore the old in order to free it,
         * then restore the new back again */

        rx_new = adapter->rx_ring;
        tx_new = adapter->tx_ring;
        adapter->rx_ring = rx_old;
        adapter->tx_ring = tx_old;
        ixgb_free_rx_resources(adapter);
        ixgb_free_tx_resources(adapter);
        adapter->rx_ring = rx_new;
        adapter->tx_ring = tx_new;
        if ((err = ixgb_up(adapter)))
            return err;
        ixgb_set_speed_duplex(netdev);
    }

    return 0;
err_setup_tx:
    ixgb_free_rx_resources(adapter);
err_setup_rx:
    adapter->rx_ring = rx_old;
    adapter->tx_ring = tx_old;
    ixgb_up(adapter);
    return err;
}

static int
ixgb_set_phys_id(struct net_device *netdev, enum ethtool_phys_id_state state)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);

    switch (state) {
    case ETHTOOL_ID_ACTIVE:
        return 2;

    case ETHTOOL_ID_ON:
        ixgb_led_on(&adapter->hw);
        break;

    case ETHTOOL_ID_OFF:
    case ETHTOOL_ID_INACTIVE:
        ixgb_led_off(&adapter->hw);
    }

    return 0;
}

static int
ixgb_get_sset_count(struct net_device *netdev, int sset)
{
    switch (sset) {
    case ETH_SS_STATS:
        return IXGB_STATS_LEN;
    default:
        return -EOPNOTSUPP;
    }
}

static void
ixgb_get_ethtool_stats(struct net_device *netdev,
        struct ethtool_stats *stats, u64 *data)
{
    struct ixgb_adapter *adapter = netdev_priv(netdev);
    int i;
    char *p = NULL;

    ixgb_update_stats(adapter);
    for (i = 0; i < IXGB_STATS_LEN; i++) {
        switch (ixgb_gstrings_stats[i].type) {
        case NETDEV_STATS:
            p = (char *) netdev +
                    ixgb_gstrings_stats[i].stat_offset;
            break;
        case IXGB_STATS:
            p = (char *) adapter +
                    ixgb_gstrings_stats[i].stat_offset;
            break;
        }

        data[i] = (ixgb_gstrings_stats[i].sizeof_stat ==
            sizeof(u64)) ? *(u64 *)p : *(u32 *)p;
    }
}

static void
ixgb_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
{
    int i;

    switch(stringset) {
    case ETH_SS_STATS:
        for (i = 0; i < IXGB_STATS_LEN; i++) {
            memcpy(data + i * ETH_GSTRING_LEN,
            ixgb_gstrings_stats[i].stat_string,
            ETH_GSTRING_LEN);
        }
        break;
    }
}

static const struct ethtool_ops ixgb_ethtool_ops = {
    .get_settings = ixgb_get_settings,
    .set_settings = ixgb_set_settings,
    .get_drvinfo = ixgb_get_drvinfo,
    .get_regs_len = ixgb_get_regs_len,
    .get_regs = ixgb_get_regs,
    .get_link = ethtool_op_get_link,
    .get_eeprom_len = ixgb_get_eeprom_len,
    .get_eeprom = ixgb_get_eeprom,
    .set_eeprom = ixgb_set_eeprom,
    .get_ringparam = ixgb_get_ringparam,
    .set_ringparam = ixgb_set_ringparam,
    .get_pauseparam = ixgb_get_pauseparam,
    .set_pauseparam = ixgb_set_pauseparam,
    .get_msglevel = ixgb_get_msglevel,
    .set_msglevel = ixgb_set_msglevel,
    .get_strings = ixgb_get_strings,
    .set_phys_id = ixgb_set_phys_id,
    .get_sset_count = ixgb_get_sset_count,
    .get_ethtool_stats = ixgb_get_ethtool_stats,
};

void ixgb_set_ethtool_ops(struct net_device *netdev)
{
    SET_ETHTOOL_OPS(netdev, &ixgb_ethtool_ops);
}